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(11)

EP 4 218 213 A1

(12)

(43) Date of publication: 02.08.2023 Bulletin 2023/31 (21) Application number: 21798916.9 (22) Date of filing: 23.09.2021

(51) International Patent Classification (IPC):  H04L 43/10(2022.01) H04L 43/0817(2022.01) H04W 24/08(2009.01) H04L 43/0852(2022.01) (52) Cooperative Patent Classification (CPC): H04L 43/10; H04L 43/0817; H04L 43/0858; H04W 24/08; H04W 24/04 (86) International application number: PCT/US2021/071569 (87) International publication number: WO 2022/067325 (31.03.2022 Gazette 2022/13)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 24.09.2020 US 202017031312 (71) Applicant: Cisco Technology, Inc. San Jose, California 95134-1706 (US)	(72) Inventors: SZIGETI, Thomas Vancouver, British Columbia V6R 3L4 (CA) HENRY, Jerome Pittsboro, North Carolina 27312 (US) BARTON, Robert E. Richmond, British Columbia V7C 5R6 (CA) SMITH, Malcolm M. Richardson, Texas 75082 (US) (74) Representative: Warren, Caroline Elisabeth et al Mathys & Squire The Shard 32 London Bridge Street London SE1 9SG London SE1 9SG (GB)